GB0526389D0 - Random refractive index modulated optical fibers - Google Patents

Random refractive index modulated optical fibers

Info

Publication number
GB0526389D0
GB0526389D0 GBGB0526389.2A GB0526389A GB0526389D0 GB 0526389 D0 GB0526389 D0 GB 0526389D0 GB 0526389 A GB0526389 A GB 0526389A GB 0526389 D0 GB0526389 D0 GB 0526389D0
Authority
GB
United Kingdom
Prior art keywords
refractive index
optical fibers
modulated optical
index modulated
random refractive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GBGB0526389.2A
Other versions
GB2421586A (en
GB2421586B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Luna Energy LLC
Baker Hughes Holdings LLC
Original Assignee
Baker Hughes Inc
Luna Energy LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baker Hughes Inc, Luna Energy LLC filed Critical Baker Hughes Inc
Publication of GB0526389D0 publication Critical patent/GB0526389D0/en
Publication of GB2421586A publication Critical patent/GB2421586A/en
Application granted granted Critical
Publication of GB2421586B publication Critical patent/GB2421586B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/0208—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G01D5/3537—Optical fibre sensor using a particular arrangement of the optical fibre itself
    • G01D5/3538—Optical fibre sensor using a particular arrangement of the optical fibre itself using a particular type of fiber, e.g. fibre with several cores, PANDA fiber, fiber with an elliptic core or the like
GB0526389A 2004-12-23 2005-12-23 Random refractive index modulated optical fibers Active GB2421586B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/020,955 US7369730B2 (en) 2004-12-23 2004-12-23 Random refractive index modulated optical fibers

Publications (3)

Publication Number Publication Date
GB0526389D0 true GB0526389D0 (en) 2006-02-08
GB2421586A GB2421586A (en) 2006-06-28
GB2421586B GB2421586B (en) 2008-09-17

Family

ID=35841192

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0526389A Active GB2421586B (en) 2004-12-23 2005-12-23 Random refractive index modulated optical fibers

Country Status (3)

Country Link
US (1) US7369730B2 (en)
CA (1) CA2531274C (en)
GB (1) GB2421586B (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
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US7473906B2 (en) 2005-04-28 2009-01-06 Claudio Oliveira Egalon Reversible, low cost, distributed optical fiber sensor with high spatial resolution
US7595876B2 (en) * 2006-01-11 2009-09-29 Baker Hughes Incorporated Method and apparatus for estimating a property of a fluid downhole
US7576856B2 (en) * 2006-01-11 2009-08-18 Baker Hughes Incorporated Method and apparatus for estimating a property of a fluid downhole
JP2008159718A (en) * 2006-12-21 2008-07-10 Sharp Corp Multichip module and its manufacturing method, and mounting structure of multichip module and its manufacturing method
US7493009B2 (en) * 2007-05-25 2009-02-17 Baker Hughes Incorporated Optical fiber with tin doped core-cladding interface
US7947945B2 (en) * 2008-02-29 2011-05-24 Corning Incorporated Fiber optic sensing system, method of using such and sensor fiber
US8463083B2 (en) * 2009-01-30 2013-06-11 Claudio Oliveira Egalon Side illuminated multi point multi parameter optical fiber sensor
US8087477B2 (en) * 2009-05-05 2012-01-03 Baker Hughes Incorporated Methods and apparatuses for measuring drill bit conditions
EP2567205A2 (en) 2010-05-04 2013-03-13 Sensortran, Inc. Mitigation of radiation induced attenuation losses in optic fibers
US8638444B2 (en) 2011-01-11 2014-01-28 Baker Hughes Incorporated Sensor array configuration for swept-wavelength interferometric-based sensing systems
US8592747B2 (en) 2011-01-19 2013-11-26 Baker Hughes Incorporated Programmable filters for improving data fidelity in swept-wavelength interferometry-based systems
GB2500255B (en) * 2012-03-16 2020-04-15 Oxsensis Ltd Optical sensor
US9321222B2 (en) * 2013-08-13 2016-04-26 Baker Hughes Incorporated Optical fiber sensing with enhanced backscattering
JP7046843B2 (en) * 2016-06-29 2022-04-04 インテュイティブ サージカル オペレーションズ， インコーポレイテッド Methods and equipment for OFDR call monitoring and optimization
CN110823834B (en) * 2019-11-16 2022-10-11 中北大学 High-sensitivity SPR refractive index sensor based on plastic optical fiber periodic narrow groove structure
US20230141615A1 (en) * 2021-11-11 2023-05-11 Baker Hughes Oilfield Operations Llc Grating position dithering for improved distributed acoustic sensing engineered fiber performance

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US4840481A (en) * 1987-12-10 1989-06-20 Simmonds Precision Polarimetric optical frequency domain distributed strain sensor and method
US4983034A (en) * 1987-12-10 1991-01-08 Simmonds Precision Products, Inc. Composite integrity monitoring
US5208136A (en) * 1990-09-06 1993-05-04 The United States Of America As Represented By The Secretary Of The Air Force Fabricating of integrated optics
US5178978A (en) * 1990-09-06 1993-01-12 The United States Of America As Represented By The Secretary Of The Air Force Fabricating integrated optics
JPH08125607A (en) * 1994-10-21 1996-05-17 Fujitsu Ltd Optical transmission line fault point location method and optical transmission line
KR100322430B1 (en) * 1994-11-29 2002-03-08 레비스 스테픈 이 Optical fiber bragg grating coating removal detection
CN1093842C (en) * 1995-02-01 2002-11-06 等离子光纤维股份有限公司 Optical fiber having reduced polarisation mode dispersion
US5798521A (en) * 1996-02-27 1998-08-25 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Apparatus and method for measuring strain in bragg gratings
NL1008642C2 (en) * 1998-03-19 1999-09-23 Oce Tech Bv Digital copier with a personal data storage system.
US6384915B1 (en) * 1998-03-30 2002-05-07 The Regents Of The University Of California Catheter guided by optical coherence domain reflectometry
US6205265B1 (en) * 1998-05-29 2001-03-20 Litton Systems, Inc. Apparatus and method for isolated photobleaching fiber optic rotation sensor coils
US6993222B2 (en) * 1999-03-05 2006-01-31 Rj Mears, Llc Optical filter device with aperiodically arranged grating elements
US6545760B1 (en) * 1999-03-25 2003-04-08 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Apparatus and method for measuring strain in optical fibers using rayleigh scatter
US6724528B2 (en) * 2001-02-27 2004-04-20 The United States Of America As Represented By The Secretary Of The Navy Polarization-maintaining optical fiber amplifier employing externally applied stress-induced birefringence
US6643429B2 (en) * 2001-06-07 2003-11-04 Nortel Networks Limited Dispersion compensation apparatus and method utilising sampled Bragg gratings
US6995900B2 (en) * 2003-01-21 2006-02-07 Jds Uniphase Corporation Method of making a short-pass fiber with controlled cut-off wavelength
US6724469B2 (en) * 2002-03-15 2004-04-20 Exfo Electro-Optical Engineering Inc. Polarization-OTDR for measuring characteristics of optical fibers
DE60312847D1 (en) 2002-05-17 2007-05-10 Univ Leland Stanford Junior DOUBLE COATED FIBER LASERS AND AMPLIFIERS WITH FIBER GRIDS WITH GREAT GRID PERIOD
EP1553666B1 (en) 2004-01-08 2006-05-31 Alcatel Cascaded Raman laser with unpaired reflector

Also Published As

Publication number Publication date
CA2531274C (en) 2009-06-02
GB2421586A (en) 2006-06-28
GB2421586B (en) 2008-09-17
US20060140529A1 (en) 2006-06-29
CA2531274A1 (en) 2006-06-23
US7369730B2 (en) 2008-05-06

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)